Document Detail


Beat-to-beat blood pressure analysis after premature ventricular contraction indicates sensitive baroreceptor dysfunction in Parkinson's disease.
MedLine Citation:
PMID:  16258941     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Extrasystoles occur in normal subjects but are significant more frequently (16.25% vs. 55%; chi(2) = 19.3; P < 0.001) seen in Parkinson's disease (PD) patients. The extrasystolic decreases in stroke volume and systolic pressure activate sympathetic vasomotor innervation and lead to a blood pressure increase for a few heartbeats. The purpose of this study was to prove whether the short time analysis of this blood pressure regulation allows the assessment of sympathetic neurocirculatory function. Records of noninvasive blood pressure monitoring were reviewed from 40 PD patients and 80 controls. A battery of cardiovascular autonomic tests, including Valsalva maneuver, tilt-table testing, echocardiography, and cardiac scintigraphy with [(123)I]meta-iodobenzylguanidine were performed. Fifty-five percent of the PD patients had at least one premature ventricular contraction (PVC) in 10 minutes lying supine at rest. After every PVC (13 PVCs) recorded from normal subjects, we found an increase in systolic blood pressure above base line with a maximum at the seventh heart beat. In all of the 22 PD patients, the systolic blood pressure was significantly decreased less than baseline in every PVC from the second to the ninth postextrasystolic beat (P < 0.001). In both groups, the extrasystolic fall in blood pressure was on average approximately 22%. The postextrasystolic potentiation did not differ (5.3% vs. 4.4%, not significant). If a PVC occurs, the analysis of short-time blood pressure regulation is a sensitive tool for baroreceptor reflex function. The advantage of this method results from the independence of patients cooperation and the high sensitivity to prove a sympathetic neurocirculatory failure within 10 heart beats.
Authors:
Carl-Albrecht Haensch; Johannes Jörg
Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Movement disorders : official journal of the Movement Disorder Society     Volume:  21     ISSN:  0885-3185     ISO Abbreviation:  Mov. Disord.     Publication Date:  2006 Apr 
Date Detail:
Created Date:  2006-04-17     Completed Date:  2006-09-26     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8610688     Medline TA:  Mov Disord     Country:  United States    
Other Details:
Languages:  eng     Pagination:  486-91     Citation Subset:  IM    
Copyright Information:
Copyright 2005 Movement Disorder Society.
Affiliation:
Autonomic Laboratory, Department of Neurology of the University of Witten/Herdecke, HELIOS-Klinikum Wuppertal, Germany. chaensch@wuppertal.helios-kliniken.de
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MeSH Terms
Descriptor/Qualifier:
3-Iodobenzylguanidine / pharmacokinetics
Adult
Aged
Aged, 80 and over
Blood Pressure / physiology*
Blood Pressure Monitoring, Ambulatory / methods
Case-Control Studies
Chi-Square Distribution
Electrocardiography / methods
Female
Humans
Male
Middle Aged
Parkinson Disease / complications,  physiopathology*
Pressoreceptors / physiology*
Radiopharmaceuticals / pharmacokinetics
Regional Blood Flow / physiology
Tilt-Table Test / methods
Ventricular Premature Complexes / complications,  physiopathology*
Chemical
Reg. No./Substance:
0/Radiopharmaceuticals; 77679-27-7/3-Iodobenzylguanidine

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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